基于ARM和CPLD的横机机头电路测试系统

Test system based on ARM+CPLD for head control part of computerized flat knitting machine

为解决电脑横机机头控制系统信号的测试可靠性问题,基于低成本、高效率的考虑,研究设计了机头控制系统电路板的批量测试系统。该系统采用TI公司的LM 3S5R31芯片作为系统的核心部分,通过CPLD进行I/O扩展及辅助控制,使得系统功能灵活强大。将同一信号通路中的前后级元件信号进行编码,向待测板发送握手信号并使之发送反馈信号,该系统将反馈信号进行采样并在程序中比较计算,制作了实物并进行了大量实验。研究结果表明,该测试系统可有效解决电脑横机机头控制系统的快速故障测试及定位问题。

In order to solve the problem of reliability testing of the head control part of computerized fiat knitting machine,the complete test system of the cireuit boards of head control part was investigated. After the analysis of the requirement of the system and the leature of the signals,a system used LM3S5R31 of TI as a centre part and a CPLD as a auxiliary control part was established. A method was presented to encoding the signal of the former and the latter component in the same signal path. The system were evaluated on the accuracy,reliability and the efficiency,the performance of the real object were tested. The experimental results show that this system can solve problems such as locate and solve the problems of head control part of computerized fiat knitting machine quickly.